Chuck device
AssigneeSMC Corporation
InventorsMasayuki Hosono, Jiro Mandokoro
Life of this patent
Estimating the term…
Abstract
A chuck device has a pair of grippers pivotally supported in a recess defined in an end of a body for angular movement about a predetermined angle, a joint member connected to a piston reciprocally movably disposed in a cylinder chamber defined in the body, and a pair of rollers engaging respectively in grooves in the grippers and angularly movably mounted on the joint member. Linear movement of the piston can be transmitted as angular movement to the grippers through the rollers while the rollers are angularly moving with respect to the joint member. A cover is mounted on the end of the body in closing relation to the recess.
Claims17
A chuck device comprising:
- a body having a pair of fluid pressure inlet/outlet ports, a cylinder chamber defined therein, and a recess defined in an end of the body;
- a piston mechanism having a piston reciprocally movable axially in said cylinder chamber;
- a pair of grippers pivotally movably supported in said recess for angular movement about a predetermined angle, wherein each of said grippers has a slot defined therein;
- a joint member connected to said piston;
- and
- a pair of rollers engaging respectively in said slots and angularly movably mounted on said joint member, whereby linear movement of said piston can be transmitted as angular movement to said grippers through said rollers while the rollers are angularly moving with respect to said joint member.
A method for gripping a workpiece, the method comprising:
- displacing linearly in unison with each other a joint member and a piston located within a body, the body comprising a first end and a recess, the joint member comprising holes wherein a pair of rollers are movably fitted;
- rotating a pair of grippers attached to the body, each gripper comprising a slot and a finger, said rotating comprising:
- engaging the rollers in the slots, wherein each roller has an axis and rotates about its axis when engaging in its corresponding slot;
- driving the rollers along their corresponding slots thereby rotating each gripper;
- and
- preventing foreign particles from entering the recess of the body.
A chuck device comprising:
- means for displacing linearly in unison with each other a joint member and a piston located within a body, the body comprising a first end and a recess, the joint member comprising holes wherein a pair of rollers are movably fitted;
- means for rotating a pair of grippers attached to the body, each gripper comprising a slot and a finger, said means for rotating comprising:
- means for engaging the rollers in the slots, wherein each roller has an axis and rotates about its axis when engaging in its corresponding slot;
- means for driving the rollers along their corresponding slots thereby rotating each gripper;
- and
- means for preventing foreign particles from entering the recess of the body.
Dependencies are inferred from the claim text.